Quality of Life in French Cities
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Quality of life in French cities Measuring the je ne sais quoi Mylène Feuillade∗ Under the supervision of Pierre-Philippe Combes A thesis presented for the degree of Master in Economics Department of Economics QEM, Erasmus Mundus Sciences Po Paris Université Paris I 22 May, 2018 ∗I would like to sincerely thank Pierre-Philippe Combes for agreeing to supervise me, and for his time, comments and invaluable advices during the project. I am also extremely grateful to Paul Bouche, Sophie Nottmeyer, Manola Zabalza, Marie Cases and Zydney Wong for their help and support. Abstract This paper aims at estimating the quality of life in French cities from a revealed- preference approach. Using official city-level data on wages and amenities, as well as web-scrapped information on housing prices, we perform a two-step analysis. First, we study how rents and wages co-vary to estimate quality of life. We then use those results to find out how households value amenities. We prove that using a direct measure of available income to model households’ location choices or trying to replicate expected wage produces very similar results in terms of quality of life estimation. Overall we find that cities in Southern France and in the Alps offer the highest quality of life, while areas in rural regions of central France fare worst. Households appear to highly value proximity to the shore and mild-winters. Easy access to cultural amenities and health services is also found to significantly impact quality of life. 2 Contents Introduction 5 1 A model of households residential choice6 1.1 Using available income..................................6 1.2 Expected Wages.....................................8 1.3 Empirical strategy....................................9 2 Data 10 2.1 Sampling......................................... 10 2.2 Income and wages.................................... 10 2.3 Housing prices...................................... 11 2.4 Amenities......................................... 12 2.5 Other data........................................ 12 3 Limitations 12 3.1 Limitations of the model................................. 12 3.2 Limitations of the empirical strategy: identification problems............ 13 4 First-step regressions: Wages and rent gradients 14 4.1 Rent estimates...................................... 14 4.2 Wages and income.................................... 16 4.3 On the way to expected wages: unemployment and tax rate............. 19 4.4 Is there a bell curve?................................... 21 5 Indexes of Quality of Life 23 5.1 Testing the parameters in the quality of life equation................. 23 5.2 Quality of Life indexes.................................. 25 6 The determinants of Quality of Life 31 Conclusion 38 Bibliography 39 Appendixes 41 A Visualisation of the wage and rent gradients 41 B Further insights into the bell curve 43 C Quality of life: difference between rankings 46 D Quality of life: full rankings across Urban Areas 47 E Results at the Urban Unit level 55 3 List of Tables 1 Housing price and city size, across Urban Area.................... 15 2 Wage and density across Urban Areas......................... 17 3 Wage and city size (across Urban Area)........................ 17 4 Available income and city size (across Urban Area).................. 18 5 Unemployment and city size across Urban Areas................... 20 6 Tax rate and city size across urban areas........................ 21 7 Bell curve: net wage and city size (Urban Areas)................... 22 8 Housing price and available income by Urban Areas................. 23 9 Housing price and expected wage by Urban Areas................... 25 10 Quality of Life in Urban Areas, computed with income and constant share of housing 26 11 Quality of Life in Urban Areas, computed with income and variable share of housing 27 12 Quality of Life in Urban Areas, computed with wage and constant share of housing 29 13 Quality of Life in Urban Areas, computed with wage and variable share of housing 31 14 Correlation matrix between QoL rankings (Urban Areas).............. 32 15 Predictive power of amenities on Quality of Life (computed from income)..... 36 16 Predictive power of amenities on Quality of Life (computed from expected wage). 37 List of Figures 1 Quality of life: housing costs versus available income................. 28 2 Quality of life: housing costs versus expected wage.................. 30 4 Introduction Households deciding on their city of residence need to strike a balance between highly-paid jobs, good quality of life and low housing costs. Those three elements are often difficult to obtain together, since desirable areas in terms of amenities are generally expensive. This paper seeks to exploit this threefold relationship, and uses information on rents and revenues to develop a quality of life index of French cities, based on households’ willingness to pay to live in a city. Because households are heterogeneous and imperfectly mobile, and because quality of life is a complex concept containing many subjective components, this index can only provide a limited perspective on an intricate question. Nevertheless, it provides an economic intuition and results that are in line with popular expectations on quality of life, with urban areas in Southern France or in the Alps being ranked highest, and cities located in decaying regions of central France being ranked lowest. The literature on quality of life is large, and generally relies on the assumption that quality of life can be measured as a weighted average of amenities. The obvious question is then how to determine the weights of each amenities. An empirical answer to that question builds on the theory by Tiebout (1956) that households "vote by their feet" and will move to the area that fits best their preferences for publicly-provided goods. By assuming that households are fully mobile and perfectly informed, it then becomes possible to evaluate the valuation of such publicly provided goods, or amenities, from the workers’ location choice. If people can vote with their feet and move freely to the place that maximises their utility, it follows that in equilibrium, no one could be made better-off by moving to a new city. Rosen (1979) was the first to use this type of model to implicitly estimate the valuation of amenities through the analysis of wage variation across areas. The intuition behind his method is that in spatial equilibrium households are only willing to accept lower wages in exchange for better amenities. Studying how wages co-vary with amenities hence allows to estimate how much households are willing to pay to access an amenity. Rosen then used the computed valuation to weight amenities and construct a quality of life index that was directly determined from the workers’ observed behaviour. Roback (1982) later extended this model to include variation in rents, arguing that the worker could pay for access to amenities both through lower wages and through higher rents. She hence used co-variance in wages, rents and amenities to directly estimate household’s valuation of amenities, and then compute a quality of life index. Since then a large number of quality of life indexes have been developed based on the co- variation of wages, rents and amenities, mainly on US data (Berger, Blomquist, and Waldner, 1987, Blomquist et al., 1988, Chen et al., 2008...). Albouy (2008) builds on the Rosen-Roback model of compensating differentials, and improves it with three adjustments. First, he tries to account for differences in cost of living that do not stem from rents. Second, he incorporates into the model sources of income other than wages, that do not depend on location. Finally, he introduces taxes into his quality of life equation. With those three amendments, he obtains a quality of life ranking that is more believable and more in line with the non-academic literature on areas’ livability than the previous estimates. He then regresses quality of life on some amenities, to deduce their valuation by households. This two-steps estimation 5 is the reverse of the approach by Roback (1982) who estimated valuation of amenities and used those results to estimate quality of life. The method we use in this paper, following Albouy, has the advantage that it does not require any assumptions on which amenities are most valued by households and should be included in the computation of a quality of life index. Therefore, it does not rely either on the availability of data on a large range of amenities. Most of the literature on quality of life focuses on US data. Some studies have previously been done in Russia (Berger, Blomquist, and Peter, 2008), Germany (Buettner et al., 2009), or Italy (Colombo et al., 2014), but to the best of our knowledge no hedonic quality of life rankings has ever been computed on French data. This might be simply be due to a lack of availabe data on housing prices, a core element of the revealed-preferences approach. Another specificity of the European case, is the relative immobility of European workers. Cheshire et al. (2006) argue that European households are less mobile than their American counterparts, which would weaken the theoretical foundation of the revealed-preference. However, the authors also find that population movement within European countries does respond to quality of life differences, and in particular to climate. There is hence some space to try and estimate a compensating differentials model within countries. In this paper, we will try to use Albouy’s (2008) model on French data, with a few amendments to the model. First, differences in wages are replaced by difference in available income, which is what Albouy tries to recreate when he incorporates taxes and non-wage revenues. We will also compute differences in expected wages, which include city-dependent taxes and unemployment rate, to obtain an alternative quality of life measure. Those amendments are presented in the first section of this paper. Section2 presents the data we used. Section3 explains the limitations of our analysis, and details the endogeneity issues we face in our estimations.